/Engine/Source/Editor/SequencerCore/Public/MVVM/Views/STrackLane.h
Sets the vertical offset of this track lane and all parent track lanes given the vertical offset of a particular outliner item inside the current track lane (i.e. an outliner item that's a child of the item that created this track lane) Note that the given itemcouldactually be the one that created this track lane.
void PositionParentTrackLanes ( [TViewModelPtr](API\Editor\SequencerCore\TViewModelPtr)< [IOutlinerExtension](API\Editor\SequencerCore\MVVM\Extensions\IOutlinerExtension) > InItem, float InItemTop )